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Day 18

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Tim Stallard
2016-12-19 00:27:20 +00:00
parent 0bd0b89e91
commit 6f45c42781
2 changed files with 14 additions and 0 deletions
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7
day18/part1.js Normal file
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nextline = (line)=>(line.split("").map((char, i, arr)=>([arr[i-1], arr[i], arr[i+1]]).map((char)=>(char ? char : ".")).join("")).map((str)=>(["^^.", ".^^", "..^", "^.."].indexOf(str) != -1)).map((trap)=>(trap ? "^" : ".")).join(""));
var lines = [".^^^^^.^^^..^^^^^...^.^..^^^.^^....^.^...^^^...^^^^..^...^...^^.^.^.......^..^^...^.^.^^..^^^^^...^."];
while(lines.length < 40){
lines.push(nextline(lines[lines.length - 1]));
}
console.log(lines.map((line)=>(line.replace(/\^/g, ""))).join("").length);

7
day18/part2.js Normal file
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nextline = (line)=>(line.split("").map((char, i, arr)=>([arr[i-1], arr[i], arr[i+1]]).map((char)=>(char ? char : ".")).join("")).map((str)=>(["^^.", ".^^", "..^", "^.."].indexOf(str) != -1)).map((trap)=>(trap ? "^" : ".")).join(""));
var lines = [".^^^^^.^^^..^^^^^...^.^..^^^.^^....^.^...^^^...^^^^..^...^...^^.^.^.......^..^^...^.^.^^..^^^^^...^."];
while(lines.length < 400000){
lines.push(nextline(lines[lines.length - 1]));
}
console.log(lines.map((line)=>(line.replace(/\^/g, ""))).join("").length);